Exhaust valve assembly

Abstract

The present invention relates to the field of pneumatic product exhaust technology, and provides an exhaust valve assembly, comprising: a valve seat assembly, a valve seat assembly with an exhaust channel therein, an assembly shaft provided at one end of the valve seat assembly and an assembly portion formed at the other end; a sealing gasket, which is fitted on the assembly shaft and abuts the exhaust end face of the valve seat assembly; a fixed retaining spring, which is fitted on the assembly shaft and abuts the sealing gasket; in the sealed state of the exhaust valve assembly, the sealing gasket covers the exhaust channel under the action of the fixed retaining spring; in the exhaust state of the exhaust valve assembly, the sealing gasket opens the exhaust channel under the action of the gas pressure from the exhaust channel. The exhaust valve assembly of the present invention realizes an independent exhaust function through the cooperation of the valve seat assembly, the sealing gasket and the fixed retaining spring, can meet the exhaust requirements under different application conditions, and has universality and versatility; and the exhaust valve assembly has a simple structure, is easy to install, is plug-and-play, and can be disassembled and assembled multiple times.

Description

Technical Field

[0001] The present invention relates to the technical field of pneumatic product exhaust, in particular to an exhaust valve assembly. Background Art

[0002] Pneumatic products are widely used in industrial fields such as vehicles. Pneumatic products require exhaust structures to achieve exhaust.

[0003] Currently, the exhaust structure of pneumatic products is usually integrated with the pneumatic products, and corresponding exhaust structures need to be designed for different pneumatic products.

[0004] For example, the current design of a vehicle's air suspension exhaust structure typically involves installing a matching exhaust valve at the air suspension's exhaust port. This exhaust is achieved through the coordination of the exhaust valve and other air suspension components. This current design is specific to a specific application and cannot be universally applied.

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present invention, and therefore may include information that does not constitute prior art known to ordinary technicians in this field. Summary of the Invention

[0006] In view of this, the present invention provides an exhaust valve assembly, which can realize an independent exhaust function through the cooperation of a valve seat assembly, a sealing gasket and a fixed retaining spring, can meet the exhaust requirements under different application conditions, and has universality and versatility; and the exhaust valve assembly has a simple structure, is easy to install, is plug and play, and can be disassembled and assembled multiple times.

[0007] According to one aspect of the present invention, an exhaust valve assembly is provided, comprising: a valve seat assembly, in which an exhaust channel is provided, an assembly shaft is provided at one end of the valve seat assembly and an assembly portion is formed at the other end; a sealing gasket, which is sleeved on the assembly shaft and abuts the exhaust end face of the valve seat assembly; a fixing retaining spring, which is sleeved on the assembly shaft and abuts the sealing gasket; in the sealed state of the exhaust valve assembly, the sealing gasket covers the exhaust channel under the action of the fixing retaining spring; in the exhaust state of the exhaust valve assembly, the sealing gasket opens the exhaust channel under the action of the gas pressure from the exhaust channel.

[0008] In some embodiments, the valve seat assembly includes: a valve seat body, having an assembly end face on which the assembly axis is set; a disc member, which is mounted on the assembly axis and abuts the assembly end face; the end face of the disc member away from the valve seat body forms the exhaust end face, and the exhaust channel passes through the valve seat body and the disc member.

[0009] In some embodiments, the valve seat body is provided with an exhaust cavity and an exhaust groove connecting the exhaust cavity and the assembly end face, and the disc member is provided with an exhaust hole; the exhaust cavity, the exhaust groove and the exhaust hole form the exhaust channel.

[0010] In some embodiments, the exhaust holes include a plurality of circular holes evenly distributed circumferentially; and the exhaust slots include a plurality of fan-shaped holes evenly distributed circumferentially.

[0011] In some embodiments, the assembly end surface is provided with a first annular groove, the first annular groove is located at the periphery of the exhaust channel and is embedded with a first sealing ring; the disc member presses against the first sealing ring.

[0012] In some embodiments, a second annular groove is provided on the outer periphery of the valve seat body, a second sealing ring is embedded in the second annular groove, and the second sealing ring radially protrudes from the outer periphery of the valve seat body.

[0013] In some embodiments, the end of the valve seat body away from the assembly end surface forms the assembly portion, and the assembly portion is provided with a snap fit.

[0014] In some embodiments, the latch comprises at least one annular protrusion disposed on the outer circumference of the valve seat body.

[0015] In some embodiments, the distal end of the assembly shaft is stepped.

[0016] In some embodiments, the exhaust end face is provided with an oblique wedge lip, and the sealing gasket is provided with a sealing lip protruding toward the exhaust end face, and the sealing lip overlaps the oblique wedge lip.

[0017] In some embodiments, the exhaust end face and the sealing gasket respectively include a main body and an edge portion connected to each other; the main body of the sealing gasket abuts against the main body of the exhaust end face, and the inclined wedge lip and the sealing lip are respectively formed on the exhaust end face and the edge portion of the sealing gasket.

[0018] In some embodiments, the fixed retaining spring abuts against the main body of the sealing gasket; and the lip recess of the sealing lip forms an impurity blocking groove.

[0019] In some embodiments, the fixed retaining ring is provided with a mounting hole for fitting onto the assembly shaft and a top surface for abutting against the sealing gasket; a transition slope is connected between the mounting hole and the top surface.

[0020] In some embodiments, the edge of the fixing spring is provided with a circular edge extending away from the sealing gasket; an impurity receiving groove is formed between the circular edge and the transition slope.

[0021] The beneficial effects of the present invention compared with the prior art include at least:

[0022] The exhaust valve assembly of the present invention is provided with an exhaust passage and an assembly shaft, a sealing gasket sleeved on the assembly shaft and abutting the exhaust end face of the valve seat assembly, and a fixing retaining spring sleeved on the assembly shaft and abutting the sealing gasket. In the sealing state, the sealing gasket seals the exhaust passage under the action of the fixing retaining spring to prevent the entry of impurities, and in the exhaust state, the sealing gasket opens the exhaust passage under the action of gas pressure to achieve exhaust. In this way, through the cooperation of the valve seat assembly, the sealing gasket and the fixing retaining spring, an independent exhaust function is achieved, which can meet the exhaust requirements under different application conditions.

[0023] In addition, through the assembly part of the valve seat assembly, the exhaust valve assembly can be conveniently assembled to any suitable pneumatic product to form the exhaust structure of the corresponding pneumatic product, which is universal and versatile; and the exhaust valve assembly has a simple structure, is easy to install, is plug and play, and can be disassembled and assembled multiple times.

[0024] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are incorporated into and constitute a part of this specification, illustrate embodiments consistent with the present invention, and together with the description, serve to explain the principles of the present invention. Obviously, the drawings described below are only some embodiments of the present invention, and it is clear that those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0026] Figure 1 A schematic diagram showing the overall structure of an exhaust valve assembly according to an embodiment of the present invention is shown;

[0027] Figure 2 A schematic cross-sectional view showing an exhaust state of an exhaust valve assembly according to an embodiment of the present invention;

[0028] Figure 3 A schematic cross-sectional view showing a sealed state of an exhaust valve assembly according to an embodiment of the present invention;

[0029] Figure 4 A schematic structural diagram of a valve seat body of an exhaust valve assembly according to an embodiment of the present invention is shown;

[0030] Figure 5 A schematic structural diagram of a disc member of an exhaust valve assembly according to an embodiment of the present invention is shown;

[0031] Figure 6 A schematic structural diagram of a sealing gasket of an exhaust valve assembly according to an embodiment of the present invention is shown;

[0032] Figure 7 A schematic structural diagram of a fixing spring of an exhaust valve assembly in an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0033] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to make this disclosure thorough and complete and to fully convey the concepts of the example embodiments to those skilled in the art.

[0034] The accompanying drawings are merely schematic illustrations of the present invention and are not necessarily drawn to scale. Like reference numerals throughout the figures indicate like or similar parts, and repeated descriptions thereof will be omitted. The use of terms such as "first," "second," and similar terms in the detailed description does not denote any order, quantity, or importance, but is merely used to distinguish different components.

[0035] It should be noted that, in the absence of conflict, the embodiments of the present invention and features in different embodiments may be combined with each other.

[0036] Figure 1 The overall structure of the exhaust valve assembly in the embodiment is shown. Figure 2 The cross-sectional structure of the exhaust valve assembly in the embodiment is shown. Figure 3 The cross-sectional structure of the sealing state of the exhaust valve assembly in the embodiment is shown; Figures 1 to 3 As shown, the exhaust valve assembly provided by the embodiment of the present invention includes:

[0037] The valve seat assembly 10 has an exhaust passage P therein, an assembly shaft 210 is provided at one end of the valve seat assembly 10 and an assembly portion 220 is formed at the other end;

[0038] The sealing gasket 40 is mounted on the assembly shaft 210 and abuts against the exhaust end surface 310 of the valve seat assembly 10;

[0039] The fixed retaining ring 50 is mounted on the assembly shaft 210 and abuts against the sealing gasket 40;

[0040] In the sealed state of the exhaust valve assembly, the sealing gasket 40 covers the exhaust passage P under the action of the fixed retaining spring 50;

[0041] In the exhaust state of the exhaust valve assembly, the sealing gasket 40 opens the exhaust passage P under the action of the gas pressure from the exhaust passage P.

[0042] The fixed retaining spring 50 serves as an axial limit for the sealing gasket 40; in the sealed state, the fixed retaining spring 50 presses the sealing gasket 40 against the exhaust end face 310, covering the exhaust passage P; in the exhaust state, the sealing gasket 40 pushes open the fixed retaining spring 50 under the action of gas pressure, forming a gap between the sealing gasket 40 and the exhaust end face 310 for gas discharge.

[0043] The above-mentioned exhaust valve assembly is provided with an exhaust channel P and an assembly shaft 210, a sealing gasket 40 that is sleeved on the assembly shaft 210 and abuts the exhaust end face 310 of the valve seat assembly 10, and a fixed retaining spring 50 that is sleeved on the assembly shaft 210 and abuts the sealing gasket 40. In the sealed state, the sealing gasket 40 covers the exhaust channel P under the action of the fixed retaining spring 50 to prevent impurities from entering, and in the exhaust state, the sealing gasket 40 opens the exhaust channel P under the action of gas pressure to achieve exhaust. In this way, through the cooperation of the valve seat assembly 10, the sealing gasket 40 and the fixed retaining spring 50, the independent exhaust function of the exhaust valve assembly is realized, which can meet the exhaust requirements under different application conditions.

[0044] In addition, through the assembly portion 220 of the valve seat assembly 10, the exhaust valve assembly can be conveniently assembled to any suitable pneumatic product to form the exhaust structure of the corresponding pneumatic product, which is universal and versatile; and the exhaust valve assembly has a simple structure, is easy to install, is plug-and-play, and can be disassembled and assembled multiple times.

[0045] Figure 4 The structure of the valve seat body of the exhaust valve assembly in the embodiment is shown. Figure 5 The structure of the disc member of the exhaust valve assembly in the embodiment is shown; Figures 1 to 5 As shown, in some embodiments, the valve seat assembly 10 includes:

[0046] The valve seat body 20 has an assembly end surface 230 on which the assembly axis 210 is disposed;

[0047] The disc member 30 is mounted on the assembly shaft 210 and abuts against the assembly end surface 230;

[0048] An end surface of the disc member 30 away from the valve seat body 20 forms an exhaust end surface 310 , and an exhaust passage P passes through the valve seat body 20 and the disc member 30 .

[0049] A first pin hole 360 ​​is formed in the center of the disc 30 to facilitate fitting of the disc 30 onto the assembly shaft 210. The valve seat assembly 10, formed by the valve seat body 20 and the disc 30, facilitates separate machining of the valve seat body 20 and the disc 30, thereby conveniently and accurately obtaining the assembly portion 220 adapted to various pneumatic products and the exhaust end face 310 for sealing engagement with the sealing gasket 40.

[0050] In some embodiments, the valve seat body 20 is provided with an exhaust cavity 200a and an exhaust groove 200b connecting the exhaust cavity 200a and the assembly end surface 230, and the disc member 30 is provided with an exhaust hole 300; the exhaust cavity 200a, the exhaust groove 200b and the exhaust hole 300 form an exhaust channel P.

[0051] When the corresponding pneumatic product is exhausted to the outside through the exhaust valve assembly, refer to Figure 2 As shown, the gas passes through the exhaust cavity 200a and the exhaust groove 200b of the valve seat body 20, the exhaust hole 300 of the disc member 30, and the gap between the sealing gasket 40 and the exhaust end surface 310 of the disc member 30 formed by the gas pressure acting on the sealing gasket 40, and is discharged into the atmosphere.

[0052] Continue to combine Figures 1 to 5 As shown, in some embodiments, the exhaust hole 300 includes a plurality of circular holes uniformly distributed circumferentially; the exhaust slot 200b includes a plurality of fan-shaped holes uniformly distributed circumferentially.

[0053] The exhaust hole 300 with a circular hole structure is easy to manufacture and can ensure the strength of the disc part 30, avoiding the local setting of excessively large exhaust holes that affect the structural stability of the disc part 30; the exhaust groove 200b with a fan-shaped hole structure can achieve a larger exhaust volume and can be adapted to the exhaust ports of most pneumatic products.

[0054] In some embodiments, the assembly end surface 230 of the valve seat body 20 is provided with a first annular groove 240 . The first annular groove 240 is located at the periphery of the exhaust passage P and is embedded with a first sealing ring 250 . The disc member 30 presses against the first sealing ring 250 .

[0055] During assembly, the first sealing ring 250 is preloaded with a certain amount of pressure, pressing against the disc 30 and the assembly end surface 230 to ensure a tight fit between the disc 30 and the valve seat body 20. Furthermore, the first annular groove 240 is located around the periphery of the exhaust passage P, specifically around the exhaust groove 200b and the exhaust hole 300 (the "periphery" refers to the radial periphery). This seals the exhaust passage P and prevents it from communicating with the outside when not exhausting air.

[0056] In some embodiments, a second annular groove 260 is provided on the outer periphery of the valve seat body 20 , and a second sealing ring 270 is embedded in the second annular groove 260 . The second sealing ring 270 radially protrudes from the outer periphery of the valve seat body 20 .

[0057] When the exhaust valve assembly is assembled to a pneumatic product, the second sealing ring 270 can be pressed between the valve seat body 20 and the assembly portion of the pneumatic product to achieve sealing to prevent external impurities from entering or the transmission medium inside the pneumatic product from overflowing. Figure 3As shown by the arrow S1 , when external impurities enter through the assembly gap between the valve seat body 20 and the assembly portion 20 ′ of the pneumatic product, they can be blocked by the second sealing ring 270 ; similarly, if the transmission medium inside the pneumatic product overflows, it can also be blocked by the second sealing ring 270 .

[0058] The second annular groove 260 and the second sealing ring 270 may be flexibly connected. The second sealing ring 270 can be adaptively adjusted to seal and connect the valve seat body 20 and the assembly portion 20 ′ of the pneumatic product during the assembly of the exhaust valve assembly.

[0059] In some embodiments, an end portion of the valve seat body 20 away from the assembly end surface 230 forms an assembly portion 220 , and the assembly portion 220 is provided with a snap member 280 .

[0060] By means of the snap fastener 280 , the exhaust valve assembly can be conveniently assembled to the corresponding pneumatic product to achieve installation and positioning; and the snap fastener assembly method is plug-and-play and can be disassembled multiple times.

[0061] In some embodiments, the latch 280 includes Figure 4 At least one annular protrusion is shown disposed on the outer circumference of the valve seat body 20 .

[0062] The circular protrusion can stably, conveniently and detachably realize the installation and positioning of the exhaust valve assembly.

[0063] In other embodiments, the snap member 280 is not limited to the circular snap form, and can be any suitable snap structure; alternatively, the assembly portion 220 can be provided with other structures that facilitate assembly, such as a screw structure, a riveted structure, and the like.

[0064] In some embodiments, the distal end 210 ′ of the assembly shaft 210 of the valve seat body 20 is formed in a stepped shape.

[0065] The assembly shaft 210 may be in the form of a pin; the end 210 ′ of the assembly shaft 210 is designed to be stepped, which can facilitate the assembly of the assembly shaft 210 to corresponding components of different pneumatic products.

[0066] Figure 6 The structure of the sealing gasket of the exhaust valve assembly in the embodiment is shown; Figures 1 to 6 As shown, in some embodiments, the exhaust end surface 310 of the disc 30 is provided with an oblique wedge lip 320 , and the sealing gasket 40 is provided with a sealing lip 410 protruding toward the exhaust end surface 310 , and the sealing lip 410 overlaps the oblique wedge lip 320 .

[0067] A second pin hole 460 is formed at the center of the sealing gasket 40 to facilitate fitting the sealing gasket 40 onto the assembly shaft 210 .

[0068] The edge of the exhaust end face 310 protrudes toward the sealing gasket 40, forming a tapered, wedge-shaped lip 320. The edge of the sealing lip 410 opens away from the exhaust end face 310, forming a sealing lip 410 that protrudes toward the exhaust end face 310. The sealing lip 410 overlaps the wedge-shaped lip 320, creating a dual protective effect. When exhaust is required, gas pressure from the exhaust passage P acts on the sealing lip 410 of the sealing gasket 40, pushing the sealing gasket 40 open and opening the exhaust passage P. When exhaust is not required, external impurities and water vapor act on the lip recess 410' of the sealing gasket 40, opposite the protrusion of the sealing lip 410, to compress the sealing gasket 40, ensuring that the exhaust passage P is closed and protected from external impurities.

[0069] In some embodiments, the exhaust end face 310 and the sealing gasket 40 respectively include a main body and an edge portion connected to each other; the main body 430 of the sealing gasket 40 abuts against the main body 330 of the exhaust end face 310, the oblique wedge lip 320 is formed on the edge portion 340 of the exhaust end face 310, and the sealing lip 410 is formed on the edge portion 440 of the sealing gasket 40.

[0070] The main body 430 of the sealing gasket 40 abuts against the main body 330 of the exhaust end face 310, ensuring that the center of the sealing gasket 40 is tightly abutted against the center of the exhaust end face 310; the oblique wedge lip 320 and the sealing lip 410 are respectively formed on the exhaust end face 310 and the edge of the sealing gasket 40, ensuring that the edge 340 of the exhaust end face 310 is sealed and overlapped with the edge 440 of the sealing gasket 40; thereby, the sealing gasket 40 and the exhaust end face 310 are sealed and matched.

[0071] In some embodiments, the fixing spring 50 abuts against the main body 430 of the sealing gasket 40 to ensure that the central portion of the sealing gasket 40 is axially compressed. In addition, the lip recess 410' of the sealing lip 410 forms an impurity blocking groove.

[0072] Combine Figure 3 and Figure 6 As shown, when the exhaust valve assembly is in a sealed state, most of the external impurities enter the lip recess 410' of the sealing lip 410 of the sealing gasket 40 and are reflected back (see arrow S2); a small amount of impurities enter through the assembly gap between the valve seat body 20 and the assembly portion 20' of the pneumatic product and are blocked by the second sealing ring 270.

[0073] Figure 7 The structure of the fixed spring of the exhaust valve assembly in the embodiment is shown; Figures 1 to 7 As shown, in some embodiments, the fixed retaining ring 50 is provided with a mounting hole 520 for fitting the assembly shaft 210 and a top surface 540 for abutting the sealing gasket 40 ; a transition slope 550 is connected between the mounting hole 520 and the top surface 540 .

[0074] The fixed retaining ring 50 is mounted on the assembly shaft 210 through the mounting hole 520 and abuts against the main body 430 of the sealing gasket 40 through the abutting surface 540 , thereby limiting the axial position of the sealing gasket 40 and the disc member 30 .

[0075] The transition slope 550 connecting the mounting hole 520 and the top surface 540 is used to separate the mounting hole 520 and the top surface 540 to avoid the mutual influence between the mounting force of the mounting hole 520 and the top force of the top surface 540, ensuring that the fixed retaining spring 50 can be stably installed on the assembly shaft 210 and press against the sealing gasket 40 and the disc member 30.

[0076] In some embodiments, the edge of the fixed retaining spring 50 is provided with a circular edge 560 extending away from the sealing gasket 40 ; an impurity receiving groove is formed between the circular edge 560 and the transition slope 550 .

[0077] The impurity holding tank is used to collect and reflect external impurities to prevent external impurities from invading the exhaust valve assembly.

[0078] In summary, the exhaust valve assembly of the present invention has the following beneficial effects:

[0079] The valve seat assembly 10 including the valve seat body 20 and the disc member 30, the sealing gasket 40, and the fixing spring 50 cooperate to realize an independent exhaust function, and can be used as an independent exhaust valve assembly to meet the exhaust requirements under different application conditions, with universality. The exhaust valve assembly can be conveniently assembled to any suitable pneumatic product through the assembly portion 220 such as the ring buckle to form the exhaust structure of the corresponding pneumatic product, with universal applicability.

[0080] The fixed retaining spring 50 can press the sealing gasket 40 and the disc 30 against the exhaust end surface 310 of the valve seat body 20 in a sealed state to cover the exhaust passage P; and in an exhaust state, it allows the sealing gasket 40 to be pushed open to allow the gas in the exhaust passage P to be discharged;

[0081] Through multiple seals such as the sealing lip 410 of the sealing gasket 40, the first sealing ring 250, the second sealing ring 270, etc., the exhaust function of the exhaust valve assembly can be guaranteed while preventing the invasion of external impurities; in addition, the exhaust valve assembly has a simple structure and is easy to install. It does not require special tooling and is plug-and-play, and can be disassembled and assembled multiple times.

[0082] The above is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. An exhaust valve assembly, characterized in that: include: A valve seat assembly is provided with an exhaust passage therein, wherein an assembly shaft is provided at one end of the valve seat assembly and an assembly portion is formed at the other end, and the assembly portion is used for assembling the exhaust valve assembly to a pneumatic product; The valve seat assembly includes: a valve seat body having an assembly end surface on which the assembly axis is provided; a disc member, which is fitted onto the assembly axis and abuts against the assembly end surface; an end surface of the disc member away from the valve seat body forming an exhaust end surface, and an end of the valve seat body away from the disc member forming the assembly portion; and the exhaust passage passes through the valve seat body and the disc member. The valve seat body is provided with an exhaust cavity and an exhaust groove communicating with the exhaust cavity and the assembly end surface; the disc member is provided with an exhaust hole, the exhaust hole comprises a plurality of circular holes evenly distributed circumferentially; the exhaust groove comprises a plurality of fan-shaped holes evenly distributed circumferentially; the exhaust cavity, the exhaust groove and the exhaust hole form the exhaust channel; a sealing gasket, sleeved on the assembly shaft and abutting against the exhaust end surface of the valve seat assembly; A fixed retaining ring, which is sleeved on the assembly shaft and abuts against the sealing gasket; In the sealed state of the exhaust valve assembly, the sealing gasket covers the exhaust passage under the action of the fixing spring; In the exhaust state of the exhaust valve assembly, the sealing gasket opens the exhaust channel under the action of the gas pressure from the exhaust channel.

2. The exhaust valve assembly according to claim 1, wherein The assembly end surface is provided with a first annular groove, the first annular groove is located at the periphery of the exhaust passage, and a first sealing ring is embedded therein; The disc member presses against the first sealing ring.

3. The exhaust valve assembly according to claim 1, wherein A second annular groove is provided on the outer periphery of the valve seat body, a second sealing ring is embedded in the second annular groove, and the second sealing ring radially protrudes from the outer periphery of the valve seat body.

4. The exhaust valve assembly according to claim 1, wherein The end portion of the valve seat body away from the assembly end surface forms the assembly portion, and the assembly portion is provided with a snap fit.

5. The exhaust valve assembly according to claim 4, wherein: The latching member includes at least one annular protrusion arranged on the outer circumference of the valve seat body.

6. The exhaust valve assembly according to claim 1, wherein The end of the assembly shaft is formed in a stepped shape.

7. The exhaust valve assembly according to claim 1, wherein The exhaust end face is provided with an oblique wedge lip, and the sealing gasket is provided with a sealing lip protruding toward the exhaust end face, and the sealing lip overlaps the oblique wedge lip.

8. The exhaust valve assembly according to claim 7, wherein: The exhaust end surface and the sealing gasket respectively include a main body portion and an edge portion connected to each other; The main body of the sealing gasket abuts against the main body of the exhaust end surface, and the oblique wedge lip and the sealing lip are respectively formed on the exhaust end surface and the edge of the sealing gasket.

9. The exhaust valve assembly according to claim 7, wherein: The fixed clamping spring abuts against the main body of the sealing gasket; The lip recess of the sealing lip forms a foreign matter retaining groove.

10. The exhaust valve assembly according to claim 1, wherein The fixed clamping ring is provided with a mounting hole for fitting the assembly shaft and a top surface for abutting the sealing gasket; A transition slope is connected between the mounting hole and the abutting surface.

11. The exhaust valve assembly according to claim 10, wherein The edge of the fixed retaining spring is provided with a circular edge extending away from the sealing gasket; An impurity receiving groove is formed between the annular edge and the transition slope.

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